FR2865057B1 - METHOD FOR IMPROVING IMAGES OF DIGITAL IMPRESSIONS - Google Patents
METHOD FOR IMPROVING IMAGES OF DIGITAL IMPRESSIONSInfo
- Publication number
- FR2865057B1 FR2865057B1 FR0450055A FR0450055A FR2865057B1 FR 2865057 B1 FR2865057 B1 FR 2865057B1 FR 0450055 A FR0450055 A FR 0450055A FR 0450055 A FR0450055 A FR 0450055A FR 2865057 B1 FR2865057 B1 FR 2865057B1
- Authority
- FR
- France
- Prior art keywords
- image
- blocks
- determined
- digital impressions
- improving images
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000000034 method Methods 0.000 title abstract 2
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T5/00—Image enhancement or restoration
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T5/00—Image enhancement or restoration
- G06T5/10—Image enhancement or restoration using non-spatial domain filtering
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/20—Special algorithmic details
- G06T2207/20048—Transform domain processing
- G06T2207/20056—Discrete and fast Fourier transform, [DFT, FFT]
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- Multimedia (AREA)
- Image Processing (AREA)
- Image Analysis (AREA)
- Collating Specific Patterns (AREA)
- Editing Of Facsimile Originals (AREA)
Abstract
The process involves standardizing an initial image, and determining useful area of the image. The image is cut into several blocks and a FFT algorithm is applied for each block. Average frequencies of the fingerprint lines are determined for the blocks from the FFT algorithm. Gabor filters are constructed from parameters determined by the frequencies to filter the blocks, and orientations of the image are determined.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0450055A FR2865057B1 (en) | 2004-01-09 | 2004-01-09 | METHOD FOR IMPROVING IMAGES OF DIGITAL IMPRESSIONS |
PCT/FR2005/050010 WO2005071602A2 (en) | 2004-01-09 | 2005-01-07 | Method for improving images of fingerprints |
EP05717657A EP1706840A2 (en) | 2004-01-09 | 2005-01-07 | Method for improving images of fingerprints |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0450055A FR2865057B1 (en) | 2004-01-09 | 2004-01-09 | METHOD FOR IMPROVING IMAGES OF DIGITAL IMPRESSIONS |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2865057A1 FR2865057A1 (en) | 2005-07-15 |
FR2865057B1 true FR2865057B1 (en) | 2006-06-16 |
Family
ID=34685048
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR0450055A Expired - Fee Related FR2865057B1 (en) | 2004-01-09 | 2004-01-09 | METHOD FOR IMPROVING IMAGES OF DIGITAL IMPRESSIONS |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1706840A2 (en) |
FR (1) | FR2865057B1 (en) |
WO (1) | WO2005071602A2 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EA200900144A1 (en) * | 2008-12-19 | 2009-12-30 | Владимир Николаевич Бичигов | METHOD OF EVALUATING THE IMAGE QUALITY OF THE DACTYLOSCOPIC PATTERN |
FR3084945B1 (en) * | 2018-08-10 | 2020-08-07 | Idemia Identity & Security France | PROCESS FOR ANALYSIS OF A FOOTPRINT |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5659626A (en) * | 1994-10-20 | 1997-08-19 | Calspan Corporation | Fingerprint identification system |
DE10212277A1 (en) * | 2002-03-20 | 2003-10-02 | Philips Intellectual Property | Process for improving fingerprint images |
-
2004
- 2004-01-09 FR FR0450055A patent/FR2865057B1/en not_active Expired - Fee Related
-
2005
- 2005-01-07 EP EP05717657A patent/EP1706840A2/en not_active Withdrawn
- 2005-01-07 WO PCT/FR2005/050010 patent/WO2005071602A2/en active Application Filing
Also Published As
Publication number | Publication date |
---|---|
EP1706840A2 (en) | 2006-10-04 |
WO2005071602A2 (en) | 2005-08-04 |
FR2865057A1 (en) | 2005-07-15 |
WO2005071602A3 (en) | 2008-11-06 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |
Effective date: 20100930 |